Deamination of β-alanine induced by hydroxyl radicals and monovalent copper ions. A pulse radiolysis study

1992 ◽  
Vol 192 (1) ◽  
pp. 87-93 ◽  
Author(s):  
Sara Goldstein ◽  
Gidon Czapski ◽  
Haim Cohen ◽  
Dan Meyerstein
Keyword(s):  
Hydroxyl Radicals ◽  
Pulse Radiolysis ◽  
Copper Ions

scholarly journals Killing of Bacillus Spores by Aqueous Dissolved Oxygen, Ascorbic Acid, and Copper Ions

2003 ◽  
Vol 69 (4) ◽  
pp. 2245-2252 ◽  
Author(s):  
J. B. Cross ◽  
R. P. Currier ◽  
D. J. Torraco ◽  
L. A. Vanderberg ◽  
G. L. Wagner ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Dissolved Oxygen ◽  
Hydroxyl Radicals ◽  
Fenton Reaction ◽  
Copper Ions ◽  
Transition Metal Ions ◽  
Fenton Reagent ◽  
Bacillus Spores ◽  
Modified Fenton

ABSTRACT An approach to decontamination of biological endospores is discussed. Specifically, the performance of an aqueous modified Fenton reagent is examined. A modified Fenton reagent formulation of cupric chloride, ascorbic acid, and sodium chloride is shown to be an effective sporicide under aerobic conditions. The traditional Fenton reaction involves the conversion of hydrogen peroxide to hydroxyl radical by aqueous ionic catalysts such as the transition metal ions. Our modified Fenton reaction involves the conversion of aqueous dissolved oxygen to hydrogen peroxide by an ionic catalyst (Cu2+) and then subsequent conversion to hydroxyl radicals. Results are given for the modified Fenton reagent deactivating spores of Bacillus globigii. A biocidal mechanism is proposed that is consistent with our experimental results and independently derived information found in the literature. This mechanism requires diffusion of relatively benign species into the interior of the spore, where dissolved O2 is then converted through a series of reactions which ultimately produce hydroxyl radicals that perform the killing action.

scholarly journals Profiling the oxidative activation of DMSO-F6 by pulse radiolysis and translational potential for radical C–H trifluoromethylation

2019 ◽  
Vol 17 (45) ◽  
pp. 9734-9742 ◽  
Author(s):  
Nico Santschi ◽  
Benson J. Jelier ◽  
Samuel Stähelin ◽  
Thomas Nauser
Keyword(s):  
Dimethyl Sulfoxide ◽  
Hydroxyl Radicals ◽  
Pulse Radiolysis ◽  
Oxidative Activation

The improved synthesis of perfluorinated dimethyl sulfoxide, DMSO-F6, and its activation with hydroxyl radicals to afford trifluoromethyl radicals is presented.

Role of hydroxyl radicals and trapped holes in photocatalysis. A pulse radiolysis study

1991 ◽  
Vol 95 (13) ◽  
pp. 5166-5170 ◽  
Author(s):  
D. Lawless ◽  
N. Serpone ◽  
D. Meisel
Keyword(s):  
Hydroxyl Radicals ◽  
Pulse Radiolysis

Oxidation of aqueous bromide(1-) by hydroxyl radicals, studies by pulse radiolysis

1977 ◽  
Vol 81 (15) ◽  
pp. 1447-1448 ◽  
Author(s):  
Avner Mamou ◽  
Joseph Rabani ◽  
David Behar
Keyword(s):  
Hydroxyl Radicals ◽  
Pulse Radiolysis

scholarly journals Reaction of Br3·2- with 2-Deoxy-D-ribose. A Preferred Attack at C-1

1978 ◽  
Vol 33 (6) ◽  
pp. 666-668 ◽  
Author(s):  
Barry J. Parsons ◽  
Dietrich Schulte-Frohlinde ◽  
Clemens von Sonntag
Keyword(s):  
Aqueous Solutions ◽  
Hydroxyl Radicals ◽  
Pulse Radiolysis ◽  
Hydrogen Abstraction ◽  
Major Product ◽  
Alternative Route ◽  
Sugar Moiety ◽  
Bromide Ions

Abstract In the photolysis of 5-bromouracil containing DNA Br atoms are expected inter mediates. In order to evaluate the possible site of attack of the Br atom at the sugar moiety of DNA the reaction of 2-deoxy-D-ribose with the Br atom (complexed with two bromide ions) was investigated. Hydroxyl radicals generated by the radiolysis of N2O saturated aqueous solutions were converted into Br3·2- radicals by 1 M bromide ions. Br3·2- reacts with 2-deoxy-D-ribose (k = 3.7 · 104M-1s-1, pulse radiolysis). The major product is 2-deoxy-D-erythro-pentonic acid (G = 2.4, γ-radiolysis). It is formed by hydrogen abstraction from C-l and oxidation of this radical by other radicals. An alternative route via the radical at C-2 is neglible. It follows that Br3·2- reacts preferentially at C-1 of 2-deoxy-D-ribose

Sign in / Sign up

Export Citation Format

Share Document